Hello ! Lets Crack the crossword puzzle

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Across
  1. 3. quality - essence
  2. 4. o ranking - hierarchy
  3. 7. -cater
  4. 8. one's own free will - voluntarily
  5. 10. - cornerstone
  6. 12. to a newspaper- columnist
  7. 14. -adapt
  8. 15. - equality
  9. 17. -persuade
  10. 18. perspective
Down
  1. 1. -further
  2. 2. -diverse
  3. 5. -feature
  4. 6. to understand -complex
  5. 9. appealing
  6. 11. - stereotype
  7. 13. ne's abilities -challenging
  8. 16. - exclusive